/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:30:16,029 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 19:30:16,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:30:16,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:30:16,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:30:16,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:30:16,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:30:16,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:30:16,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:30:16,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:30:16,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:30:16,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:30:16,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:30:16,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:30:16,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:30:16,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:30:16,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:30:16,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:30:16,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:30:16,238 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:30:16,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:30:16,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:30:16,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:30:16,244 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:30:16,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:30:16,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:30:16,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:30:16,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:30:16,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:30:16,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:30:16,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:30:16,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:30:16,248 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:30:16,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:30:16,248 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:30:16,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:30:16,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:30:16,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:30:16,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:30:16,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:30:16,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:30:16,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:30:16,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:30:16,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:30:16,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:30:16,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:16,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:30:16,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:30:16,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:30:16,731 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:30:16,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:30:16,784 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:30:16,787 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:30:16,788 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:30:16,790 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2020-07-21 19:30:16,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c38f5df8/8fd2af4cbc0047ff8295d68fef5bf0bf/FLAG389de6ef2 [2020-07-21 19:30:17,688 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:30:17,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2020-07-21 19:30:17,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c38f5df8/8fd2af4cbc0047ff8295d68fef5bf0bf/FLAG389de6ef2 [2020-07-21 19:30:17,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c38f5df8/8fd2af4cbc0047ff8295d68fef5bf0bf [2020-07-21 19:30:17,762 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:30:17,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:30:17,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:30:17,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:30:17,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:30:17,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:30:17" (1/1) ... [2020-07-21 19:30:17,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716e79d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:17, skipping insertion in model container [2020-07-21 19:30:17,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:30:17" (1/1) ... [2020-07-21 19:30:17,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:30:17,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:30:18,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:30:18,309 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:30:18,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:30:18,377 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:30:18,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:18 WrapperNode [2020-07-21 19:30:18,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:30:18,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:30:18,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:30:18,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:30:18,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:18" (1/1) ... [2020-07-21 19:30:18,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:18" (1/1) ... [2020-07-21 19:30:18,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:18" (1/1) ... [2020-07-21 19:30:18,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:18" (1/1) ... [2020-07-21 19:30:18,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:18" (1/1) ... [2020-07-21 19:30:18,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:18" (1/1) ... [2020-07-21 19:30:18,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:18" (1/1) ... [2020-07-21 19:30:18,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:30:18,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:30:18,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:30:18,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:30:18,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:30:18,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:30:18,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:30:18,753 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 19:30:18,753 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 19:30:18,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:30:18,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:30:18,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:30:18,754 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 19:30:18,754 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 19:30:18,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:30:18,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:30:18,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:30:19,092 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:30:19,093 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:30:19,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:30:19 BoogieIcfgContainer [2020-07-21 19:30:19,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:30:19,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:30:19,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:30:19,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:30:19,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:30:17" (1/3) ... [2020-07-21 19:30:19,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7effdf79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:30:19, skipping insertion in model container [2020-07-21 19:30:19,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:30:18" (2/3) ... [2020-07-21 19:30:19,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7effdf79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:30:19, skipping insertion in model container [2020-07-21 19:30:19,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:30:19" (3/3) ... [2020-07-21 19:30:19,117 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-2.c [2020-07-21 19:30:19,137 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:30:19,154 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:30:19,180 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:30:19,249 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:30:19,249 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:30:19,249 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:30:19,250 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:30:19,250 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:30:19,250 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:30:19,250 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:30:19,252 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:30:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 19:30:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:30:19,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:19,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:19,331 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:19,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 19:30:19,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:19,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602173050] [2020-07-21 19:30:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:19,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:30:19,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:19,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:30:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:30:19,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:30:19,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602173050] [2020-07-21 19:30:19,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:30:19,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:30:19,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527790957] [2020-07-21 19:30:19,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:30:19,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:19,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:30:19,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:30:19,682 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 19:30:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:19,887 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 19:30:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:30:19,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:30:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:19,905 INFO L225 Difference]: With dead ends: 44 [2020-07-21 19:30:19,906 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 19:30:19,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:30:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 19:30:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 19:30:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:30:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:30:19,997 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 19:30:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:19,998 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:30:19,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:30:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:30:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 19:30:20,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:20,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:20,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:20,219 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:20,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:20,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 19:30:20,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:20,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39828946] [2020-07-21 19:30:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:20,293 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:30:20,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:20,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:30:20,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:30:20,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:30:20,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39828946] [2020-07-21 19:30:20,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:30:20,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:30:20,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98792499] [2020-07-21 19:30:20,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:30:20,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:20,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:30:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:30:20,359 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 19:30:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:20,493 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 19:30:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:30:20,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 19:30:20,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:20,497 INFO L225 Difference]: With dead ends: 36 [2020-07-21 19:30:20,498 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 19:30:20,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:30:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 19:30:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 19:30:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:30:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:30:20,515 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 19:30:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:20,516 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:30:20,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:30:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:30:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 19:30:20,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:20,519 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:20,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:20,736 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:20,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 19:30:20,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:20,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864737943] [2020-07-21 19:30:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:20,784 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:30:20,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:20,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:30:20,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:30:20,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:21,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:21,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:30:21,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864737943] [2020-07-21 19:30:21,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:21,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 19:30:21,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783670865] [2020-07-21 19:30:21,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:30:21,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:21,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:30:21,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:30:21,365 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 19:30:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:21,595 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 19:30:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:30:21,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 19:30:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:21,600 INFO L225 Difference]: With dead ends: 41 [2020-07-21 19:30:21,601 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 19:30:21,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:30:21,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 19:30:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 19:30:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:30:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:30:21,618 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 19:30:21,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:21,619 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:30:21,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:30:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:30:21,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:30:21,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:21,623 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:21,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:21,840 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:21,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:21,842 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 19:30:21,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:21,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11855559] [2020-07-21 19:30:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:21,933 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:30:21,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:21,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:30:21,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:30:22,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:22,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:22,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:30:22,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11855559] [2020-07-21 19:30:22,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:22,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 19:30:22,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546903892] [2020-07-21 19:30:22,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:30:22,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:30:22,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:30:22,312 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 19:30:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:22,570 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 19:30:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:30:22,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 19:30:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:22,574 INFO L225 Difference]: With dead ends: 46 [2020-07-21 19:30:22,574 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 19:30:22,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:30:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 19:30:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 19:30:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:30:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:30:22,610 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 19:30:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:22,613 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:30:22,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:30:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:30:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 19:30:22,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:22,623 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:22,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:22,844 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 19:30:22,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:22,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112856513] [2020-07-21 19:30:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:22,921 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:22,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:22,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:30:22,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 19:30:23,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:23,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:23,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:23,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:30:23,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112856513] [2020-07-21 19:30:23,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:23,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 19:30:23,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427493786] [2020-07-21 19:30:23,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:30:23,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:23,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:30:23,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:30:23,544 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 19:30:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:23,807 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 19:30:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:30:23,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 19:30:23,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:23,812 INFO L225 Difference]: With dead ends: 51 [2020-07-21 19:30:23,815 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 19:30:23,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:30:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 19:30:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 19:30:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 19:30:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 19:30:23,836 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 19:30:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:23,837 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 19:30:23,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:30:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 19:30:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 19:30:23,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:23,840 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:24,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:24,050 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 19:30:24,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:24,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723348790] [2020-07-21 19:30:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:24,095 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:24,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:24,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:30:24,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:30:24,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:24,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:24,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:24,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:30:24,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723348790] [2020-07-21 19:30:24,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:24,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 19:30:24,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345613250] [2020-07-21 19:30:24,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:30:24,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:30:24,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:30:24,595 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 19:30:24,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:24,853 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 19:30:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:30:24,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 19:30:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:24,857 INFO L225 Difference]: With dead ends: 56 [2020-07-21 19:30:24,857 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 19:30:24,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:30:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 19:30:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 19:30:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 19:30:24,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 19:30:24,873 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 19:30:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:24,892 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 19:30:24,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:30:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 19:30:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 19:30:24,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:24,901 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:25,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:25,107 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 19:30:25,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:25,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580761641] [2020-07-21 19:30:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:25,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:25,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:25,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:30:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 19:30:25,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:25,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:25,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:25,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:25,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:30:26,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580761641] [2020-07-21 19:30:26,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:26,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 19:30:26,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193524375] [2020-07-21 19:30:26,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 19:30:26,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:26,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 19:30:26,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:30:26,014 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 19:30:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:26,269 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 19:30:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:30:26,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 19:30:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:26,273 INFO L225 Difference]: With dead ends: 61 [2020-07-21 19:30:26,273 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 19:30:26,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:30:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 19:30:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 19:30:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:30:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 19:30:26,287 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 19:30:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:26,287 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 19:30:26,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 19:30:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 19:30:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 19:30:26,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:26,290 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:26,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:26,502 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:26,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:26,503 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 19:30:26,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:26,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827941118] [2020-07-21 19:30:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:26,552 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:26,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:26,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:30:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 19:30:26,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:27,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:27,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:27,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:27,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:27,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:30:27,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827941118] [2020-07-21 19:30:27,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:27,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 19:30:27,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917131194] [2020-07-21 19:30:27,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 19:30:27,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:27,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 19:30:27,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:30:27,326 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 19:30:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:27,614 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 19:30:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:30:27,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 19:30:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:27,628 INFO L225 Difference]: With dead ends: 66 [2020-07-21 19:30:27,628 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 19:30:27,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:30:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 19:30:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 19:30:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:30:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 19:30:27,644 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 19:30:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:27,648 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 19:30:27,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 19:30:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 19:30:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 19:30:27,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:27,650 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:27,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:27,865 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:27,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:27,866 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 19:30:27,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:27,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698921263] [2020-07-21 19:30:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:27,926 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:27,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:27,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:30:27,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 19:30:28,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:28,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:28,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:28,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:28,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:28,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:28,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:28,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 19:30:29,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698921263] [2020-07-21 19:30:29,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:29,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 19:30:29,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111582940] [2020-07-21 19:30:29,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 19:30:29,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:29,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 19:30:29,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:30:29,022 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 19:30:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:29,294 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 19:30:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:30:29,295 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 19:30:29,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:29,298 INFO L225 Difference]: With dead ends: 71 [2020-07-21 19:30:29,298 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 19:30:29,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:30:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 19:30:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 19:30:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 19:30:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 19:30:29,317 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 19:30:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:29,318 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 19:30:29,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 19:30:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 19:30:29,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 19:30:29,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:29,321 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:29,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:29,536 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:29,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 19:30:29,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:29,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973685807] [2020-07-21 19:30:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:29,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:29,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:30:29,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 19:30:29,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:30,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:30,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:30,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:30,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 19:30:30,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973685807] [2020-07-21 19:30:30,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:30,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 19:30:30,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644155030] [2020-07-21 19:30:30,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 19:30:30,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 19:30:30,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:30:30,856 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 19:30:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:31,168 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 19:30:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:30:31,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 19:30:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:31,172 INFO L225 Difference]: With dead ends: 76 [2020-07-21 19:30:31,173 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 19:30:31,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:30:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 19:30:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 19:30:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 19:30:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 19:30:31,224 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 19:30:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:31,230 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 19:30:31,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 19:30:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 19:30:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 19:30:31,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:31,239 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:31,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:31,454 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 19:30:31,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:31,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518641012] [2020-07-21 19:30:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:31,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:31,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:31,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:30:31,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 19:30:31,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:33,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 19:30:33,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518641012] [2020-07-21 19:30:33,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:33,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 19:30:33,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326652623] [2020-07-21 19:30:33,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:30:33,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:33,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:30:33,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:30:33,752 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 19:30:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:34,124 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 19:30:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:30:34,125 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 19:30:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:34,137 INFO L225 Difference]: With dead ends: 81 [2020-07-21 19:30:34,138 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 19:30:34,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:30:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 19:30:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 19:30:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 19:30:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 19:30:34,187 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 19:30:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:34,190 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 19:30:34,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:30:34,191 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 19:30:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 19:30:34,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:34,198 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:34,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:34,402 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:34,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:34,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 19:30:34,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:34,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587463906] [2020-07-21 19:30:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:34,503 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:34,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:30:34,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 19:30:34,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:35,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:35,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:35,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:36,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:36,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:36,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:36,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 19:30:36,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587463906] [2020-07-21 19:30:36,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:36,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 19:30:36,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692542417] [2020-07-21 19:30:36,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:30:36,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:36,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:30:36,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:30:36,420 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 19:30:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:36,837 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 19:30:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:30:36,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 19:30:36,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:36,848 INFO L225 Difference]: With dead ends: 86 [2020-07-21 19:30:36,848 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 19:30:36,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:30:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 19:30:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 19:30:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 19:30:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 19:30:36,866 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 19:30:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:36,867 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 19:30:36,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:30:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 19:30:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 19:30:36,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:36,871 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:37,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:37,084 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 19:30:37,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:37,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112082805] [2020-07-21 19:30:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:37,259 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:37,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:37,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:30:37,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 19:30:37,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:39,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:39,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:39,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:39,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:39,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:40,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:40,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:40,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:40,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:40,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:40,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 19:30:40,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112082805] [2020-07-21 19:30:40,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:40,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 19:30:40,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422746457] [2020-07-21 19:30:40,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:30:40,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:40,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:30:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:30:40,297 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 19:30:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:40,851 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 19:30:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:30:40,854 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 19:30:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:40,858 INFO L225 Difference]: With dead ends: 91 [2020-07-21 19:30:40,859 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 19:30:40,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:30:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 19:30:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 19:30:40,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 19:30:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 19:30:40,876 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 19:30:40,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:40,877 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 19:30:40,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:30:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 19:30:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 19:30:40,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:40,881 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:41,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:41,097 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:41,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:41,098 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 19:30:41,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:41,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356198340] [2020-07-21 19:30:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:41,256 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:41,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:41,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:30:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 19:30:41,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:43,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:43,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:43,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:44,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:44,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:44,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:44,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:44,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 19:30:44,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356198340] [2020-07-21 19:30:44,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:44,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 19:30:44,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707999871] [2020-07-21 19:30:44,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:30:44,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:44,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:30:44,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:30:44,620 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 19:30:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:45,092 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 19:30:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:30:45,094 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 19:30:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:45,102 INFO L225 Difference]: With dead ends: 96 [2020-07-21 19:30:45,102 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 19:30:45,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:30:45,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 19:30:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 19:30:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 19:30:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 19:30:45,131 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 19:30:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:45,132 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 19:30:45,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:30:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 19:30:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 19:30:45,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:45,142 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:45,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:45,355 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:45,356 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 19:30:45,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:45,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458378877] [2020-07-21 19:30:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:45,587 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:45,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:45,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:30:45,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 19:30:45,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:48,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:48,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:49,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:49,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:49,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:49,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:49,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:49,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:50,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:50,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:50,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 19:30:50,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458378877] [2020-07-21 19:30:50,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:50,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 19:30:50,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648469582] [2020-07-21 19:30:50,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:30:50,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:50,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:30:50,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:30:50,391 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 19:30:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:51,089 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 19:30:51,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:30:51,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 19:30:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:51,099 INFO L225 Difference]: With dead ends: 101 [2020-07-21 19:30:51,099 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 19:30:51,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:30:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 19:30:51,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 19:30:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 19:30:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 19:30:51,127 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 19:30:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:51,129 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 19:30:51,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:30:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 19:30:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 19:30:51,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:51,138 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:51,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:51,352 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 19:30:51,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:51,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050995693] [2020-07-21 19:30:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:51,770 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:51,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:30:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-21 19:30:52,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:30:54,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:54,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:55,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:55,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:56,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:56,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:56,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:56,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:56,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:30:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 19:30:56,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050995693] [2020-07-21 19:30:56,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:30:56,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 19:30:56,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588037218] [2020-07-21 19:30:56,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:30:56,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:30:56,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:30:56,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:30:56,523 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 19:30:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:30:57,280 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 19:30:57,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:30:57,282 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 19:30:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:30:57,287 INFO L225 Difference]: With dead ends: 106 [2020-07-21 19:30:57,287 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 19:30:57,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:30:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 19:30:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 19:30:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 19:30:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 19:30:57,321 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 19:30:57,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:30:57,325 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 19:30:57,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:30:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 19:30:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 19:30:57,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:30:57,338 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:30:57,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:57,552 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:30:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:30:57,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 19:30:57,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:30:57,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124365500] [2020-07-21 19:30:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:30:58,070 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:30:58,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:30:58,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:30:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:30:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-21 19:30:58,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:03,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:04,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:05,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:05,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:06,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:06,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:06,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:07,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:07,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:07,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:07,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:07,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-21 19:31:07,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124365500] [2020-07-21 19:31:07,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:07,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 19:31:07,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037246020] [2020-07-21 19:31:07,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 19:31:07,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:07,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 19:31:07,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:31:07,896 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 19:31:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:08,672 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 19:31:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:31:08,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 19:31:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:08,679 INFO L225 Difference]: With dead ends: 111 [2020-07-21 19:31:08,679 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 19:31:08,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 19:31:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 19:31:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 19:31:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 19:31:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 19:31:08,698 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 19:31:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:08,700 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 19:31:08,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 19:31:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 19:31:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 19:31:08,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:08,705 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:08,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:08,918 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:08,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 19:31:08,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:08,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379393329] [2020-07-21 19:31:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:09,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:09,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:09,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:31:09,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-21 19:31:09,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:13,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:14,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:14,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:15,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:15,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:16,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:16,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:16,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:16,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:16,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:16,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-21 19:31:16,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379393329] [2020-07-21 19:31:16,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:16,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 19:31:16,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834857995] [2020-07-21 19:31:16,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:31:16,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:16,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:31:16,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:31:16,816 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 23 states. [2020-07-21 19:31:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:17,826 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 19:31:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:31:17,827 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 418 [2020-07-21 19:31:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:17,833 INFO L225 Difference]: With dead ends: 116 [2020-07-21 19:31:17,833 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 19:31:17,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:31:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 19:31:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 19:31:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 19:31:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 19:31:17,858 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 19:31:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:17,859 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 19:31:17,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:31:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 19:31:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2020-07-21 19:31:17,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:17,868 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 42, 41, 41, 31, 31, 31, 31, 31, 31, 31, 31, 20, 20, 20, 20, 20, 20, 20, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:18,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:18,082 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:18,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:18,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1777656900, now seen corresponding path program 8 times [2020-07-21 19:31:18,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:18,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066767745] [2020-07-21 19:31:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:18,609 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:18,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:18,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:31:18,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 349 proven. 2104 refuted. 0 times theorem prover too weak. 11666 trivial. 0 not checked. [2020-07-21 19:31:19,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:23,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:23,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:25,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:25,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:27,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:28,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:28,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:28,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:29,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:29,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:29,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:29,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:29,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:29,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:29,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 349 proven. 2156 refuted. 0 times theorem prover too weak. 11614 trivial. 0 not checked. [2020-07-21 19:31:29,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066767745] [2020-07-21 19:31:29,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:29,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 19:31:29,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288133626] [2020-07-21 19:31:29,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 19:31:29,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:29,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 19:31:29,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:31:29,975 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 25 states. [2020-07-21 19:31:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:31,127 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 19:31:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:31:31,129 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 676 [2020-07-21 19:31:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:31,135 INFO L225 Difference]: With dead ends: 121 [2020-07-21 19:31:31,135 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 19:31:31,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1363 GetRequests, 1309 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:31:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 19:31:31,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 19:31:31,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 19:31:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 19:31:31,156 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 676 [2020-07-21 19:31:31,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:31,157 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 19:31:31,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 19:31:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 19:31:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2020-07-21 19:31:31,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:31,167 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 49, 47, 47, 32, 32, 32, 32, 32, 32, 32, 32, 26, 23, 23, 23, 23, 23, 23, 23, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:31,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:31,382 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:31,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1813836186, now seen corresponding path program 4 times [2020-07-21 19:31:31,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:31,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371988731] [2020-07-21 19:31:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:31,920 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:31,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:31,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1678 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:31:31,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17056 backedges. 414 proven. 2048 refuted. 0 times theorem prover too weak. 14594 trivial. 0 not checked. [2020-07-21 19:31:32,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:36,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:36,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:38,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:39,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:39,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17056 backedges. 414 proven. 2088 refuted. 0 times theorem prover too weak. 14554 trivial. 0 not checked. [2020-07-21 19:31:41,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371988731] [2020-07-21 19:31:41,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:41,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 19:31:41,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326083449] [2020-07-21 19:31:41,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:31:41,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:41,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:31:41,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:31:41,224 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 23 states. [2020-07-21 19:31:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:41,934 INFO L93 Difference]: Finished difference Result 159 states and 539 transitions. [2020-07-21 19:31:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:31:41,935 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 754 [2020-07-21 19:31:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:41,940 INFO L225 Difference]: With dead ends: 159 [2020-07-21 19:31:41,940 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 19:31:41,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1517 GetRequests, 1468 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:31:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 19:31:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 77. [2020-07-21 19:31:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 19:31:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2020-07-21 19:31:41,962 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 754 [2020-07-21 19:31:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:41,963 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2020-07-21 19:31:41,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:31:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2020-07-21 19:31:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2020-07-21 19:31:41,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:41,971 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 47, 45, 45, 45, 33, 33, 33, 33, 33, 33, 33, 25, 22, 22, 22, 22, 22, 22, 22, 19, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:42,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:42,185 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:42,185 INFO L82 PathProgramCache]: Analyzing trace with hash 848822556, now seen corresponding path program 1 times [2020-07-21 19:31:42,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:42,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022160992] [2020-07-21 19:31:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:42,725 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:42,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1700 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:31:42,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17647 backedges. 424 proven. 1891 refuted. 0 times theorem prover too weak. 15332 trivial. 0 not checked. [2020-07-21 19:31:43,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:46,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:46,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:47,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:49,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:49,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:49,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:49,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:49,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:49,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:49,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17647 backedges. 424 proven. 1924 refuted. 0 times theorem prover too weak. 15299 trivial. 0 not checked. [2020-07-21 19:31:49,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022160992] [2020-07-21 19:31:49,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:49,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:31:49,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403422262] [2020-07-21 19:31:49,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:31:49,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:31:49,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:31:49,837 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand 21 states. [2020-07-21 19:31:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:50,385 INFO L93 Difference]: Finished difference Result 179 states and 673 transitions. [2020-07-21 19:31:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:31:50,386 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 765 [2020-07-21 19:31:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:50,390 INFO L225 Difference]: With dead ends: 179 [2020-07-21 19:31:50,390 INFO L226 Difference]: Without dead ends: 175 [2020-07-21 19:31:50,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1538 GetRequests, 1494 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:31:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-21 19:31:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 79. [2020-07-21 19:31:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 19:31:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2020-07-21 19:31:50,414 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 765 [2020-07-21 19:31:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:50,415 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2020-07-21 19:31:50,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:31:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2020-07-21 19:31:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1080 [2020-07-21 19:31:50,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:50,426 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 77, 77, 61, 57, 41, 41, 41, 41, 41, 41, 41, 38, 38, 38, 38, 38, 38, 38, 25, 20, 19, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:50,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:50,641 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:50,642 INFO L82 PathProgramCache]: Analyzing trace with hash 67032718, now seen corresponding path program 1 times [2020-07-21 19:31:50,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:50,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913404659] [2020-07-21 19:31:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:51,326 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:51,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:51,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 2400 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:31:51,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 34506 backedges. 604 proven. 3056 refuted. 0 times theorem prover too weak. 30846 trivial. 0 not checked. [2020-07-21 19:31:52,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:56,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:59,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:59,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:00,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:00,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:02,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:02,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:02,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:02,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:02,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:02,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:02,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34506 backedges. 604 proven. 3096 refuted. 0 times theorem prover too weak. 30806 trivial. 0 not checked. [2020-07-21 19:32:02,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913404659] [2020-07-21 19:32:02,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:02,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 19:32:02,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029260619] [2020-07-21 19:32:02,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:32:02,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:02,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:32:02,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:32:02,818 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand 23 states. [2020-07-21 19:32:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:03,582 INFO L93 Difference]: Finished difference Result 156 states and 522 transitions. [2020-07-21 19:32:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:32:03,587 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1079 [2020-07-21 19:32:03,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:03,592 INFO L225 Difference]: With dead ends: 156 [2020-07-21 19:32:03,593 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 19:32:03,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2166 GetRequests, 2117 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:32:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 19:32:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 82. [2020-07-21 19:32:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 19:32:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2020-07-21 19:32:03,613 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 1079 [2020-07-21 19:32:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:03,614 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2020-07-21 19:32:03,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:32:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2020-07-21 19:32:03,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2020-07-21 19:32:03,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:03,625 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 70, 70, 62, 53, 36, 36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 27, 17, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:03,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:03,840 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1973171480, now seen corresponding path program 2 times [2020-07-21 19:32:03,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:03,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250235174] [2020-07-21 19:32:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:04,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:04,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2178 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:32:04,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:32:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 28341 backedges. 583 proven. 2408 refuted. 0 times theorem prover too weak. 25350 trivial. 0 not checked. [2020-07-21 19:32:05,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:32:09,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:09,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:11,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:11,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:12,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:12,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:13,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:13,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:13,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:13,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:13,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:13,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:13,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:13,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:13,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 28341 backedges. 583 proven. 2441 refuted. 0 times theorem prover too weak. 25317 trivial. 0 not checked. [2020-07-21 19:32:14,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250235174] [2020-07-21 19:32:14,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:14,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:32:14,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322046737] [2020-07-21 19:32:14,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:32:14,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:14,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:32:14,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:32:14,361 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand 21 states. [2020-07-21 19:32:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:15,008 INFO L93 Difference]: Finished difference Result 174 states and 639 transitions. [2020-07-21 19:32:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:32:15,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 980 [2020-07-21 19:32:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:15,014 INFO L225 Difference]: With dead ends: 174 [2020-07-21 19:32:15,015 INFO L226 Difference]: Without dead ends: 170 [2020-07-21 19:32:15,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1923 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:32:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-21 19:32:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 89. [2020-07-21 19:32:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-21 19:32:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 197 transitions. [2020-07-21 19:32:15,039 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 197 transitions. Word has length 980 [2020-07-21 19:32:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:15,040 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 197 transitions. [2020-07-21 19:32:15,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:32:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 197 transitions. [2020-07-21 19:32:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2020-07-21 19:32:15,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:15,052 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 79, 79, 65, 60, 44, 44, 44, 44, 44, 44, 44, 39, 39, 39, 39, 39, 39, 39, 28, 21, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:15,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:15,267 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:15,268 INFO L82 PathProgramCache]: Analyzing trace with hash -191683652, now seen corresponding path program 3 times [2020-07-21 19:32:15,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:15,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924841780] [2020-07-21 19:32:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:16,031 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:16,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:16,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:32:16,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:32:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 38234 backedges. 764 proven. 3594 refuted. 0 times theorem prover too weak. 33876 trivial. 0 not checked. [2020-07-21 19:32:17,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:32:23,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:25,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:28,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:29,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:30,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:30,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:30,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:30,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:30,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:30,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:30,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:30,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:30,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:31,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 38234 backedges. 770 proven. 3644 refuted. 0 times theorem prover too weak. 33820 trivial. 0 not checked. [2020-07-21 19:32:31,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924841780] [2020-07-21 19:32:31,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:31,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 19:32:31,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656962404] [2020-07-21 19:32:31,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 19:32:31,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:31,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 19:32:31,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:32:31,577 INFO L87 Difference]: Start difference. First operand 89 states and 197 transitions. Second operand 25 states. [2020-07-21 19:32:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:32,715 INFO L93 Difference]: Finished difference Result 263 states and 1331 transitions. [2020-07-21 19:32:32,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:32:32,717 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1134 [2020-07-21 19:32:32,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:32,725 INFO L225 Difference]: With dead ends: 263 [2020-07-21 19:32:32,726 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 19:32:32,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2277 GetRequests, 2223 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:32:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 19:32:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-07-21 19:32:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 19:32:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 326 transitions. [2020-07-21 19:32:32,761 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 326 transitions. Word has length 1134 [2020-07-21 19:32:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:32,763 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 326 transitions. [2020-07-21 19:32:32,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 19:32:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 326 transitions. [2020-07-21 19:32:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2020-07-21 19:32:32,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:32,779 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 63, 63, 58, 53, 42, 42, 42, 42, 42, 42, 42, 31, 31, 31, 31, 31, 31, 31, 31, 22, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:32,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:32,994 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:32,995 INFO L82 PathProgramCache]: Analyzing trace with hash 873446842, now seen corresponding path program 4 times [2020-07-21 19:32:32,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:32,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516309670] [2020-07-21 19:32:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:33,772 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:33,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 2224 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:32:33,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:32:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30091 backedges. 639 proven. 3181 refuted. 0 times theorem prover too weak. 26271 trivial. 0 not checked. [2020-07-21 19:32:34,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:32:40,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:40,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:43,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:43,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:44,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:45,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:45,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:46,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:46,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:46,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:46,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:47,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:47,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:47,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:47,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:47,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:47,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30091 backedges. 643 proven. 3233 refuted. 0 times theorem prover too weak. 26215 trivial. 0 not checked. [2020-07-21 19:32:47,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516309670] [2020-07-21 19:32:47,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:47,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 19:32:47,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701601671] [2020-07-21 19:32:47,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 19:32:47,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:47,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 19:32:47,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:32:47,998 INFO L87 Difference]: Start difference. First operand 142 states and 326 transitions. Second operand 25 states. [2020-07-21 19:32:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:49,542 INFO L93 Difference]: Finished difference Result 385 states and 1941 transitions. [2020-07-21 19:32:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:32:49,544 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1000 [2020-07-21 19:32:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:49,554 INFO L225 Difference]: With dead ends: 385 [2020-07-21 19:32:49,554 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 19:32:49,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2009 GetRequests, 1955 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:32:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 19:32:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2020-07-21 19:32:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 19:32:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 346 transitions. [2020-07-21 19:32:49,605 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 346 transitions. Word has length 1000 [2020-07-21 19:32:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:49,607 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 346 transitions. [2020-07-21 19:32:49,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 19:32:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 346 transitions. [2020-07-21 19:32:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 877 [2020-07-21 19:32:49,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:49,628 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 63, 63, 49, 46, 33, 33, 33, 33, 33, 33, 33, 31, 31, 31, 31, 31, 31, 31, 20, 16, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:49,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:49,843 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:49,844 INFO L82 PathProgramCache]: Analyzing trace with hash -613390039, now seen corresponding path program 5 times [2020-07-21 19:32:49,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:49,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123073380] [2020-07-21 19:32:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:50,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:50,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:50,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:32:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:32:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22575 backedges. 475 proven. 2451 refuted. 0 times theorem prover too weak. 19649 trivial. 0 not checked. [2020-07-21 19:32:51,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:32:57,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:59,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:59,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:00,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:01,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:02,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:02,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:02,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:02,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:02,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:02,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 22575 backedges. 477 proven. 2489 refuted. 0 times theorem prover too weak. 19609 trivial. 0 not checked. [2020-07-21 19:33:03,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123073380] [2020-07-21 19:33:03,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:33:03,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 19:33:03,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678635496] [2020-07-21 19:33:03,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:33:03,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:33:03,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:33:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:33:03,200 INFO L87 Difference]: Start difference. First operand 147 states and 346 transitions. Second operand 23 states. [2020-07-21 19:33:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:33:04,484 INFO L93 Difference]: Finished difference Result 263 states and 940 transitions. [2020-07-21 19:33:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:33:04,490 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 876 [2020-07-21 19:33:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:33:04,503 INFO L225 Difference]: With dead ends: 263 [2020-07-21 19:33:04,503 INFO L226 Difference]: Without dead ends: 249 [2020-07-21 19:33:04,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1760 GetRequests, 1711 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:33:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-21 19:33:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 150. [2020-07-21 19:33:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 19:33:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 358 transitions. [2020-07-21 19:33:04,560 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 358 transitions. Word has length 876 [2020-07-21 19:33:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:33:04,562 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 358 transitions. [2020-07-21 19:33:04,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:33:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 358 transitions. [2020-07-21 19:33:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2020-07-21 19:33:04,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:33:04,581 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 71, 71, 61, 53, 38, 38, 38, 38, 38, 38, 38, 35, 35, 35, 35, 35, 35, 35, 23, 23, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:33:04,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:04,795 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:33:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:33:04,795 INFO L82 PathProgramCache]: Analyzing trace with hash 157644428, now seen corresponding path program 6 times [2020-07-21 19:33:04,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:33:04,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096358626] [2020-07-21 19:33:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:05,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:33:05,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:33:05,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 2230 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:33:05,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:33:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 29740 backedges. 544 proven. 2481 refuted. 0 times theorem prover too weak. 26715 trivial. 0 not checked. [2020-07-21 19:33:06,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:33:11,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:13,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:13,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:15,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:15,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:16,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:16,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:16,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:16,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:16,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:16,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:16,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 29740 backedges. 544 proven. 2511 refuted. 0 times theorem prover too weak. 26685 trivial. 0 not checked. [2020-07-21 19:33:17,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096358626] [2020-07-21 19:33:17,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:33:17,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:33:17,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073363241] [2020-07-21 19:33:17,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:33:17,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:33:17,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:33:17,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:33:17,082 INFO L87 Difference]: Start difference. First operand 150 states and 358 transitions. Second operand 21 states. [2020-07-21 19:33:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:33:17,939 INFO L93 Difference]: Finished difference Result 299 states and 1198 transitions. [2020-07-21 19:33:17,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:33:17,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1003 [2020-07-21 19:33:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:33:17,950 INFO L225 Difference]: With dead ends: 299 [2020-07-21 19:33:17,950 INFO L226 Difference]: Without dead ends: 285 [2020-07-21 19:33:17,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2013 GetRequests, 1969 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:33:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-21 19:33:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 150. [2020-07-21 19:33:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 19:33:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 358 transitions. [2020-07-21 19:33:17,997 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 358 transitions. Word has length 1003 [2020-07-21 19:33:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:33:17,998 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 358 transitions. [2020-07-21 19:33:17,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:33:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 358 transitions. [2020-07-21 19:33:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2020-07-21 19:33:18,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:33:18,012 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 59, 57, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 23, 21, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:33:18,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:18,226 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:33:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:33:18,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1292649855, now seen corresponding path program 7 times [2020-07-21 19:33:18,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:33:18,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173499616] [2020-07-21 19:33:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:19,060 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:33:19,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:33:19,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 2207 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:33:19,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:33:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 29083 backedges. 683 proven. 2352 refuted. 0 times theorem prover too weak. 26048 trivial. 0 not checked. [2020-07-21 19:33:19,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:33:25,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:25,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:27,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:30,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:30,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:31,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:31,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:31,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:31,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:31,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:31,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:31,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:32,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 29083 backedges. 685 proven. 2383 refuted. 0 times theorem prover too weak. 26015 trivial. 0 not checked. [2020-07-21 19:33:32,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173499616] [2020-07-21 19:33:32,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:33:32,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:33:32,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431250686] [2020-07-21 19:33:32,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:33:32,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:33:32,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:33:32,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:33:32,751 INFO L87 Difference]: Start difference. First operand 150 states and 358 transitions. Second operand 21 states. [2020-07-21 19:33:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:33:33,720 INFO L93 Difference]: Finished difference Result 251 states and 812 transitions. [2020-07-21 19:33:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:33:33,722 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 993 [2020-07-21 19:33:33,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:33:33,728 INFO L225 Difference]: With dead ends: 251 [2020-07-21 19:33:33,728 INFO L226 Difference]: Without dead ends: 237 [2020-07-21 19:33:33,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1993 GetRequests, 1949 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:33:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-21 19:33:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 170. [2020-07-21 19:33:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-21 19:33:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 456 transitions. [2020-07-21 19:33:33,765 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 456 transitions. Word has length 993 [2020-07-21 19:33:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:33:33,766 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 456 transitions. [2020-07-21 19:33:33,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:33:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 456 transitions. [2020-07-21 19:33:33,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1117 [2020-07-21 19:33:33,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:33:33,784 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 80, 80, 60, 59, 42, 42, 42, 42, 42, 42, 42, 40, 40, 40, 40, 40, 40, 40, 25, 21, 20, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:33:33,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:33,988 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:33:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:33:33,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1901843083, now seen corresponding path program 8 times [2020-07-21 19:33:33,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:33:33,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288879597] [2020-07-21 19:33:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:34,896 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:33:34,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:33:34,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 2483 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:33:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:33:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 36965 backedges. 636 proven. 3172 refuted. 0 times theorem prover too weak. 33157 trivial. 0 not checked. [2020-07-21 19:33:35,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:33:43,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:45,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:45,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:47,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:48,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:48,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:48,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:49,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:49,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:49,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36965 backedges. 638 proven. 3210 refuted. 0 times theorem prover too weak. 33117 trivial. 0 not checked. [2020-07-21 19:33:50,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288879597] [2020-07-21 19:33:50,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:33:50,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 19:33:50,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511691905] [2020-07-21 19:33:50,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:33:50,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:33:50,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:33:50,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:33:50,167 INFO L87 Difference]: Start difference. First operand 170 states and 456 transitions. Second operand 23 states. [2020-07-21 19:33:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:33:51,355 INFO L93 Difference]: Finished difference Result 254 states and 839 transitions. [2020-07-21 19:33:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:33:51,359 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1116 [2020-07-21 19:33:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:33:51,365 INFO L225 Difference]: With dead ends: 254 [2020-07-21 19:33:51,366 INFO L226 Difference]: Without dead ends: 240 [2020-07-21 19:33:51,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2240 GetRequests, 2191 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:33:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-21 19:33:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 166. [2020-07-21 19:33:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-21 19:33:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 436 transitions. [2020-07-21 19:33:51,409 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 436 transitions. Word has length 1116 [2020-07-21 19:33:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:33:51,410 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 436 transitions. [2020-07-21 19:33:51,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:33:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 436 transitions. [2020-07-21 19:33:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2020-07-21 19:33:51,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:33:51,424 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 52, 52, 48, 41, 29, 29, 29, 29, 29, 29, 29, 26, 26, 26, 26, 26, 26, 26, 22, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:33:51,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:51,639 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:33:51,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:33:51,640 INFO L82 PathProgramCache]: Analyzing trace with hash -241865014, now seen corresponding path program 9 times [2020-07-21 19:33:51,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:33:51,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294641675] [2020-07-21 19:33:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:52,500 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:33:52,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:33:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1694 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:33:52,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:33:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 525 proven. 1714 refuted. 0 times theorem prover too weak. 14781 trivial. 0 not checked. [2020-07-21 19:33:53,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:33:58,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:01,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:01,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:02,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:03,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:03,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:03,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:03,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:04,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:04,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:04,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17020 backedges. 525 proven. 1746 refuted. 0 times theorem prover too weak. 14749 trivial. 0 not checked. [2020-07-21 19:34:04,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294641675] [2020-07-21 19:34:04,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:34:04,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:34:04,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471968368] [2020-07-21 19:34:04,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:34:04,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:34:04,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:34:04,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:34:04,716 INFO L87 Difference]: Start difference. First operand 166 states and 436 transitions. Second operand 21 states. [2020-07-21 19:34:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:34:05,649 INFO L93 Difference]: Finished difference Result 269 states and 930 transitions. [2020-07-21 19:34:05,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:34:05,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 762 [2020-07-21 19:34:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:34:05,659 INFO L225 Difference]: With dead ends: 269 [2020-07-21 19:34:05,660 INFO L226 Difference]: Without dead ends: 255 [2020-07-21 19:34:05,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1531 GetRequests, 1487 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:34:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-21 19:34:05,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-07-21 19:34:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-21 19:34:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 409 transitions. [2020-07-21 19:34:05,699 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 409 transitions. Word has length 762 [2020-07-21 19:34:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:34:05,700 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 409 transitions. [2020-07-21 19:34:05,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:34:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 409 transitions. [2020-07-21 19:34:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2020-07-21 19:34:05,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:34:05,719 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 76, 76, 73, 66, 46, 46, 46, 46, 46, 46, 46, 38, 38, 38, 38, 38, 38, 38, 35, 20, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:34:05,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:34:05,934 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:34:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:34:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1570063119, now seen corresponding path program 10 times [2020-07-21 19:34:05,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:34:05,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845439316] [2020-07-21 19:34:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:34:07,007 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:34:07,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:34:07,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 2577 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:34:07,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:34:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 40237 backedges. 710 proven. 2452 refuted. 0 times theorem prover too weak. 37075 trivial. 0 not checked. [2020-07-21 19:34:07,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:34:13,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:13,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:16,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:17,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:17,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:18,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:18,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:18,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:18,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:18,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:19,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 40237 backedges. 710 proven. 2476 refuted. 0 times theorem prover too weak. 37051 trivial. 0 not checked. [2020-07-21 19:34:19,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845439316] [2020-07-21 19:34:19,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:34:19,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:34:19,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786653885] [2020-07-21 19:34:19,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:34:19,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:34:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:34:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:34:19,991 INFO L87 Difference]: Start difference. First operand 160 states and 409 transitions. Second operand 19 states. [2020-07-21 19:34:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:34:20,812 INFO L93 Difference]: Finished difference Result 324 states and 1425 transitions. [2020-07-21 19:34:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:34:20,817 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1160 [2020-07-21 19:34:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:34:20,835 INFO L225 Difference]: With dead ends: 324 [2020-07-21 19:34:20,835 INFO L226 Difference]: Without dead ends: 310 [2020-07-21 19:34:20,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2326 GetRequests, 2287 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:34:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-07-21 19:34:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 162. [2020-07-21 19:34:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-21 19:34:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 422 transitions. [2020-07-21 19:34:20,928 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 422 transitions. Word has length 1160 [2020-07-21 19:34:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:34:20,930 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 422 transitions. [2020-07-21 19:34:20,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:34:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 422 transitions. [2020-07-21 19:34:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1371 [2020-07-21 19:34:20,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:34:20,966 INFO L422 BasicCegarLoop]: trace histogram [102, 102, 99, 99, 79, 78, 51, 51, 51, 51, 51, 51, 51, 49, 49, 49, 49, 49, 49, 49, 30, 27, 23, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:34:21,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:34:21,180 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:34:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:34:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash -449000011, now seen corresponding path program 11 times [2020-07-21 19:34:21,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:34:21,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971331441] [2020-07-21 19:34:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:34:22,282 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:34:22,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:34:22,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:34:22,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:34:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 55896 backedges. 743 proven. 3452 refuted. 0 times theorem prover too weak. 51701 trivial. 0 not checked. [2020-07-21 19:34:23,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:34:35,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:38,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:40,358 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 19:34:40,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:41,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:42,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:42,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:42,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:42,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:42,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:42,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:43,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 55896 backedges. 745 proven. 3480 refuted. 0 times theorem prover too weak. 51671 trivial. 0 not checked. [2020-07-21 19:34:44,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971331441] [2020-07-21 19:34:44,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:34:44,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:34:44,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526047570] [2020-07-21 19:34:44,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:34:44,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:34:44,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:34:44,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:34:44,115 INFO L87 Difference]: Start difference. First operand 162 states and 422 transitions. Second operand 21 states. [2020-07-21 19:34:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:34:44,961 INFO L93 Difference]: Finished difference Result 242 states and 759 transitions. [2020-07-21 19:34:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:34:44,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1370 [2020-07-21 19:34:44,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:34:44,971 INFO L225 Difference]: With dead ends: 242 [2020-07-21 19:34:44,971 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 19:34:44,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2703 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:34:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 19:34:44,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 160. [2020-07-21 19:34:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-21 19:34:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 409 transitions. [2020-07-21 19:34:45,004 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 409 transitions. Word has length 1370 [2020-07-21 19:34:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:34:45,005 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 409 transitions. [2020-07-21 19:34:45,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:34:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 409 transitions. [2020-07-21 19:34:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2069 [2020-07-21 19:34:45,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:34:45,051 INFO L422 BasicCegarLoop]: trace histogram [154, 154, 149, 149, 122, 121, 77, 77, 77, 77, 77, 77, 77, 74, 74, 74, 74, 74, 74, 74, 48, 44, 32, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:34:45,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:34:45,265 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:34:45,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:34:45,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1710306366, now seen corresponding path program 12 times [2020-07-21 19:34:45,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:34:45,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648721071] [2020-07-21 19:34:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:34:46,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:34:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:34:46,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 4594 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:34:46,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:34:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 128377 backedges. 1065 proven. 5486 refuted. 0 times theorem prover too weak. 121826 trivial. 0 not checked. [2020-07-21 19:34:48,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:35:01,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:04,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:06,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:06,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:06,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:07,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:07,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:07,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:07,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:07,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:07,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 128377 backedges. 1067 proven. 5517 refuted. 0 times theorem prover too weak. 121793 trivial. 0 not checked. [2020-07-21 19:35:09,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648721071] [2020-07-21 19:35:09,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:35:09,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:35:09,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874967947] [2020-07-21 19:35:09,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:35:09,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:35:09,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:35:09,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:35:09,432 INFO L87 Difference]: Start difference. First operand 160 states and 409 transitions. Second operand 21 states. [2020-07-21 19:35:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:35:10,067 INFO L93 Difference]: Finished difference Result 261 states and 893 transitions. [2020-07-21 19:35:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:35:10,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 2068 [2020-07-21 19:35:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:35:10,076 INFO L225 Difference]: With dead ends: 261 [2020-07-21 19:35:10,077 INFO L226 Difference]: Without dead ends: 244 [2020-07-21 19:35:10,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4143 GetRequests, 4099 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:35:10,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-07-21 19:35:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 183. [2020-07-21 19:35:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-21 19:35:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 527 transitions. [2020-07-21 19:35:10,117 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 527 transitions. Word has length 2068 [2020-07-21 19:35:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:35:10,118 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 527 transitions. [2020-07-21 19:35:10,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:35:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 527 transitions. [2020-07-21 19:35:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1411 [2020-07-21 19:35:10,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:35:10,149 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 96, 96, 76, 73, 56, 56, 56, 56, 56, 56, 56, 48, 48, 48, 48, 48, 48, 48, 40, 25, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:35:10,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:35:10,364 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:35:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:35:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1385137449, now seen corresponding path program 13 times [2020-07-21 19:35:10,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:35:10,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28870956] [2020-07-21 19:35:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:35:11,462 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:35:11,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:35:11,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:35:11,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:35:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 59702 backedges. 1085 proven. 3807 refuted. 0 times theorem prover too weak. 54810 trivial. 0 not checked. [2020-07-21 19:35:12,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:35:18,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:22,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:25,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:25,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:25,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:26,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:26,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:26,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:26,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:26,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:26,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 59702 backedges. 1089 proven. 3843 refuted. 0 times theorem prover too weak. 54770 trivial. 0 not checked. [2020-07-21 19:35:27,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28870956] [2020-07-21 19:35:27,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:35:27,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 19:35:27,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109432245] [2020-07-21 19:35:27,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:35:27,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:35:27,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:35:27,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:35:27,969 INFO L87 Difference]: Start difference. First operand 183 states and 527 transitions. Second operand 23 states. [2020-07-21 19:35:28,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:35:28,807 INFO L93 Difference]: Finished difference Result 255 states and 844 transitions. [2020-07-21 19:35:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:35:28,810 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1410 [2020-07-21 19:35:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:35:28,817 INFO L225 Difference]: With dead ends: 255 [2020-07-21 19:35:28,817 INFO L226 Difference]: Without dead ends: 238 [2020-07-21 19:35:28,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2828 GetRequests, 2779 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:35:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-21 19:35:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 177. [2020-07-21 19:35:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-21 19:35:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 486 transitions. [2020-07-21 19:35:28,849 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 486 transitions. Word has length 1410 [2020-07-21 19:35:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:35:28,850 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 486 transitions. [2020-07-21 19:35:28,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:35:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 486 transitions. [2020-07-21 19:35:28,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1162 [2020-07-21 19:35:28,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:35:28,867 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 81, 81, 68, 60, 45, 45, 45, 45, 45, 45, 45, 40, 40, 40, 40, 40, 40, 40, 28, 22, 21, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:35:29,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:35:29,082 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:35:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:35:29,082 INFO L82 PathProgramCache]: Analyzing trace with hash 307680954, now seen corresponding path program 14 times [2020-07-21 19:35:29,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:35:29,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039170800] [2020-07-21 19:35:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:35:30,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:35:30,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:35:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 2582 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:35:30,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:35:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 40108 backedges. 1051 proven. 3418 refuted. 0 times theorem prover too weak. 35639 trivial. 0 not checked. [2020-07-21 19:35:30,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:35:39,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:39,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:41,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:41,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:43,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:43,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:44,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:44,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:45,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:45,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:45,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:45,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:46,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:46,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:46,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:46,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 40108 backedges. 1053 proven. 3472 refuted. 0 times theorem prover too weak. 35583 trivial. 0 not checked. [2020-07-21 19:35:47,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039170800] [2020-07-21 19:35:47,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:35:47,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 19:35:47,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586039514] [2020-07-21 19:35:47,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 19:35:47,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:35:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 19:35:47,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:35:47,448 INFO L87 Difference]: Start difference. First operand 177 states and 486 transitions. Second operand 25 states. [2020-07-21 19:35:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:35:48,531 INFO L93 Difference]: Finished difference Result 280 states and 976 transitions. [2020-07-21 19:35:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:35:48,534 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1161 [2020-07-21 19:35:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:35:48,539 INFO L225 Difference]: With dead ends: 280 [2020-07-21 19:35:48,539 INFO L226 Difference]: Without dead ends: 234 [2020-07-21 19:35:48,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2331 GetRequests, 2277 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:35:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-21 19:35:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 225. [2020-07-21 19:35:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-21 19:35:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 667 transitions. [2020-07-21 19:35:48,574 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 667 transitions. Word has length 1161 [2020-07-21 19:35:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:35:48,574 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 667 transitions. [2020-07-21 19:35:48,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 19:35:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 667 transitions. [2020-07-21 19:35:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1019 [2020-07-21 19:35:48,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:35:48,590 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 70, 70, 62, 55, 39, 39, 39, 39, 39, 39, 39, 35, 35, 35, 35, 35, 35, 35, 27, 17, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:35:48,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:35:48,805 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:35:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:35:48,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1205929501, now seen corresponding path program 15 times [2020-07-21 19:35:48,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:35:48,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283368865] [2020-07-21 19:35:48,807 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:35:49,855 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:35:49,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:35:49,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 2263 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:35:49,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:35:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30704 backedges. 768 proven. 2291 refuted. 0 times theorem prover too weak. 27645 trivial. 0 not checked. [2020-07-21 19:35:50,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:35:51,373 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 19:35:56,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:56,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:58,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:00,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:00,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:00,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:00,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:01,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:01,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:01,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:01,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:01,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 30704 backedges. 770 proven. 2319 refuted. 0 times theorem prover too weak. 27615 trivial. 0 not checked. [2020-07-21 19:36:02,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283368865] [2020-07-21 19:36:02,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:36:02,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:36:02,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383393706] [2020-07-21 19:36:02,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:36:02,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:36:02,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:36:02,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:36:02,445 INFO L87 Difference]: Start difference. First operand 225 states and 667 transitions. Second operand 21 states. [2020-07-21 19:36:03,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:36:03,171 INFO L93 Difference]: Finished difference Result 371 states and 1497 transitions. [2020-07-21 19:36:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:36:03,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1018 [2020-07-21 19:36:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:36:03,182 INFO L225 Difference]: With dead ends: 371 [2020-07-21 19:36:03,182 INFO L226 Difference]: Without dead ends: 354 [2020-07-21 19:36:03,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2043 GetRequests, 1999 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:36:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-07-21 19:36:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 215. [2020-07-21 19:36:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 19:36:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 602 transitions. [2020-07-21 19:36:03,229 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 602 transitions. Word has length 1018 [2020-07-21 19:36:03,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:36:03,230 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 602 transitions. [2020-07-21 19:36:03,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:36:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 602 transitions. [2020-07-21 19:36:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1317 [2020-07-21 19:36:03,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:36:03,249 INFO L422 BasicCegarLoop]: trace histogram [100, 100, 93, 93, 76, 75, 50, 50, 50, 50, 50, 50, 50, 46, 46, 46, 46, 46, 46, 46, 30, 25, 24, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:36:03,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:36:03,450 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:36:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:36:03,451 INFO L82 PathProgramCache]: Analyzing trace with hash -429709169, now seen corresponding path program 16 times [2020-07-21 19:36:03,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:36:03,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54474973] [2020-07-21 19:36:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:36:04,692 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:36:04,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:36:04,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 2925 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:36:04,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:36:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 51577 backedges. 887 proven. 4221 refuted. 0 times theorem prover too weak. 46469 trivial. 0 not checked. [2020-07-21 19:36:05,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:36:14,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:19,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:19,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:22,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:23,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:23,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:24,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:24,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:25,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:25,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:25,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:25,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:25,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 51577 backedges. 897 proven. 4269 refuted. 0 times theorem prover too weak. 46411 trivial. 0 not checked. [2020-07-21 19:36:26,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54474973] [2020-07-21 19:36:26,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:36:26,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 19:36:26,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398318523] [2020-07-21 19:36:26,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 19:36:26,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:36:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 19:36:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:36:26,552 INFO L87 Difference]: Start difference. First operand 215 states and 602 transitions. Second operand 26 states. [2020-07-21 19:36:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:36:28,094 INFO L93 Difference]: Finished difference Result 427 states and 1719 transitions. [2020-07-21 19:36:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:36:28,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 1316 [2020-07-21 19:36:28,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:36:28,107 INFO L225 Difference]: With dead ends: 427 [2020-07-21 19:36:28,107 INFO L226 Difference]: Without dead ends: 366 [2020-07-21 19:36:28,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2641 GetRequests, 2587 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 19:36:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-07-21 19:36:28,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 289. [2020-07-21 19:36:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-07-21 19:36:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 1014 transitions. [2020-07-21 19:36:28,169 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 1014 transitions. Word has length 1316 [2020-07-21 19:36:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:36:28,170 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 1014 transitions. [2020-07-21 19:36:28,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 19:36:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 1014 transitions. [2020-07-21 19:36:28,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2020-07-21 19:36:28,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:36:28,194 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 74, 74, 60, 57, 38, 38, 38, 38, 38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 22, 20, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:36:28,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:36:28,409 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:36:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:36:28,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1624394360, now seen corresponding path program 17 times [2020-07-21 19:36:28,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:36:28,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624014604] [2020-07-21 19:36:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:36:29,534 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:36:29,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:36:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 2290 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:36:29,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:36:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 31350 backedges. 747 proven. 2797 refuted. 0 times theorem prover too weak. 27806 trivial. 0 not checked. [2020-07-21 19:36:30,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:36:39,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:39,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:42,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:42,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:43,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:43,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:45,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:45,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:45,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:45,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:45,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:46,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:46,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:46,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:46,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 31350 backedges. 755 proven. 2833 refuted. 0 times theorem prover too weak. 27762 trivial. 0 not checked. [2020-07-21 19:36:47,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624014604] [2020-07-21 19:36:47,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:36:47,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 19:36:47,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632979461] [2020-07-21 19:36:47,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:36:47,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:36:47,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:36:47,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:36:47,299 INFO L87 Difference]: Start difference. First operand 289 states and 1014 transitions. Second operand 23 states. [2020-07-21 19:36:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:36:48,364 INFO L93 Difference]: Finished difference Result 455 states and 1977 transitions. [2020-07-21 19:36:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:36:48,367 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1030 [2020-07-21 19:36:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:36:48,375 INFO L225 Difference]: With dead ends: 455 [2020-07-21 19:36:48,375 INFO L226 Difference]: Without dead ends: 382 [2020-07-21 19:36:48,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2068 GetRequests, 2019 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:36:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-07-21 19:36:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 327. [2020-07-21 19:36:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-07-21 19:36:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 1160 transitions. [2020-07-21 19:36:48,432 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 1160 transitions. Word has length 1030 [2020-07-21 19:36:48,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:36:48,432 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 1160 transitions. [2020-07-21 19:36:48,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:36:48,433 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 1160 transitions. [2020-07-21 19:36:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1367 [2020-07-21 19:36:48,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:36:48,461 INFO L422 BasicCegarLoop]: trace histogram [102, 102, 97, 97, 85, 80, 51, 51, 51, 51, 51, 51, 51, 48, 48, 48, 48, 48, 48, 48, 34, 32, 22, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:36:48,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:36:48,673 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:36:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:36:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash 857045470, now seen corresponding path program 18 times [2020-07-21 19:36:48,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:36:48,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444036421] [2020-07-21 19:36:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:36:49,924 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:36:49,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:36:49,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 3034 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:36:49,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:36:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 55570 backedges. 914 proven. 4408 refuted. 0 times theorem prover too weak. 50248 trivial. 0 not checked. [2020-07-21 19:36:50,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:02,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:02,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:08,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:08,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:11,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:12,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:12,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:13,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:13,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:13,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:14,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:14,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:14,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:14,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:14,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:14,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:14,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 55570 backedges. 918 proven. 4460 refuted. 0 times theorem prover too weak. 50192 trivial. 0 not checked. [2020-07-21 19:37:16,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444036421] [2020-07-21 19:37:16,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:16,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 19:37:16,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954892935] [2020-07-21 19:37:16,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 19:37:16,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:16,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 19:37:16,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:37:16,072 INFO L87 Difference]: Start difference. First operand 327 states and 1160 transitions. Second operand 25 states. [2020-07-21 19:37:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:17,556 INFO L93 Difference]: Finished difference Result 407 states and 1547 transitions. [2020-07-21 19:37:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:37:17,560 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1366 [2020-07-21 19:37:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:17,568 INFO L225 Difference]: With dead ends: 407 [2020-07-21 19:37:17,568 INFO L226 Difference]: Without dead ends: 346 [2020-07-21 19:37:17,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2741 GetRequests, 2687 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:37:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-07-21 19:37:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 238. [2020-07-21 19:37:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 19:37:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 653 transitions. [2020-07-21 19:37:17,615 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 653 transitions. Word has length 1366 [2020-07-21 19:37:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:17,616 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 653 transitions. [2020-07-21 19:37:17,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 19:37:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 653 transitions. [2020-07-21 19:37:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1545 [2020-07-21 19:37:17,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:17,640 INFO L422 BasicCegarLoop]: trace histogram [114, 114, 113, 113, 92, 83, 57, 57, 57, 57, 57, 57, 57, 56, 56, 56, 56, 56, 56, 56, 36, 30, 26, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:17,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:17,841 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:17,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:17,843 INFO L82 PathProgramCache]: Analyzing trace with hash -418774178, now seen corresponding path program 19 times [2020-07-21 19:37:17,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:17,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135008040] [2020-07-21 19:37:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:19,280 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:19,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 3432 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:37:19,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 71209 backedges. 874 proven. 3334 refuted. 0 times theorem prover too weak. 67001 trivial. 0 not checked. [2020-07-21 19:37:20,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:34,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:34,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:37,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:37,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:40,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:40,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:40,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:40,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:40,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:40,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:40,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:41,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:41,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 71209 backedges. 874 proven. 3360 refuted. 0 times theorem prover too weak. 66975 trivial. 0 not checked. [2020-07-21 19:37:43,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135008040] [2020-07-21 19:37:43,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:37:43,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:37:43,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018851589] [2020-07-21 19:37:43,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:37:43,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:37:43,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:37:43,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:37:43,278 INFO L87 Difference]: Start difference. First operand 238 states and 653 transitions. Second operand 19 states. [2020-07-21 19:37:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:37:44,156 INFO L93 Difference]: Finished difference Result 489 states and 2374 transitions. [2020-07-21 19:37:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:37:44,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1544 [2020-07-21 19:37:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:37:44,178 INFO L225 Difference]: With dead ends: 489 [2020-07-21 19:37:44,178 INFO L226 Difference]: Without dead ends: 472 [2020-07-21 19:37:44,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3094 GetRequests, 3055 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:37:44,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-07-21 19:37:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 240. [2020-07-21 19:37:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-21 19:37:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 667 transitions. [2020-07-21 19:37:44,258 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 667 transitions. Word has length 1544 [2020-07-21 19:37:44,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:37:44,260 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 667 transitions. [2020-07-21 19:37:44,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:37:44,260 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 667 transitions. [2020-07-21 19:37:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1304 [2020-07-21 19:37:44,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:37:44,296 INFO L422 BasicCegarLoop]: trace histogram [98, 98, 93, 93, 77, 73, 49, 49, 49, 49, 49, 49, 49, 46, 46, 46, 46, 46, 46, 46, 28, 27, 25, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:37:44,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:44,512 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:37:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:37:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1468037674, now seen corresponding path program 20 times [2020-07-21 19:37:44,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:37:44,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898427822] [2020-07-21 19:37:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:37:45,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:37:45,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:37:45,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 2896 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:37:45,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:37:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 50522 backedges. 1057 proven. 3485 refuted. 0 times theorem prover too weak. 45980 trivial. 0 not checked. [2020-07-21 19:37:46,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:37:59,117 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:37:59,220 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:37:59,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:59,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:07,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:07,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:10,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:11,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:11,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:11,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:12,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:12,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:12,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:12,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:12,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:12,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:12,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:12,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 50522 backedges. 1061 proven. 3527 refuted. 0 times theorem prover too weak. 45934 trivial. 0 not checked. [2020-07-21 19:38:14,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898427822] [2020-07-21 19:38:14,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:14,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 19:38:14,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594209470] [2020-07-21 19:38:14,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:38:14,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:14,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:38:14,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:38:14,801 INFO L87 Difference]: Start difference. First operand 240 states and 667 transitions. Second operand 23 states. [2020-07-21 19:38:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:16,106 INFO L93 Difference]: Finished difference Result 386 states and 1408 transitions. [2020-07-21 19:38:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:38:16,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1303 [2020-07-21 19:38:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:16,120 INFO L225 Difference]: With dead ends: 386 [2020-07-21 19:38:16,120 INFO L226 Difference]: Without dead ends: 343 [2020-07-21 19:38:16,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2614 GetRequests, 2565 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:38:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-07-21 19:38:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 233. [2020-07-21 19:38:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 19:38:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 645 transitions. [2020-07-21 19:38:16,155 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 645 transitions. Word has length 1303 [2020-07-21 19:38:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:16,155 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 645 transitions. [2020-07-21 19:38:16,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:38:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 645 transitions. [2020-07-21 19:38:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2020-07-21 19:38:16,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:16,167 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 75, 75, 62, 62, 40, 40, 40, 40, 40, 40, 40, 37, 37, 37, 37, 37, 37, 37, 25, 22, 18, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:16,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:16,368 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash 950917138, now seen corresponding path program 21 times [2020-07-21 19:38:16,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:16,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517865946] [2020-07-21 19:38:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:17,772 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:17,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:17,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2358 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:38:17,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 33306 backedges. 983 proven. 2280 refuted. 0 times theorem prover too weak. 30043 trivial. 0 not checked. [2020-07-21 19:38:18,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:21,717 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 19:38:23,798 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 19:38:23,903 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 19:38:35,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:39,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:40,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:41,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:42,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:42,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:42,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:42,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:42,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:42,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:43,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 33306 backedges. 987 proven. 2309 refuted. 0 times theorem prover too weak. 30010 trivial. 0 not checked. [2020-07-21 19:38:45,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517865946] [2020-07-21 19:38:45,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:45,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:38:45,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951421626] [2020-07-21 19:38:45,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:38:45,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:45,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:38:45,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:38:45,804 INFO L87 Difference]: Start difference. First operand 233 states and 645 transitions. Second operand 21 states. [2020-07-21 19:38:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:46,966 INFO L93 Difference]: Finished difference Result 353 states and 1275 transitions. [2020-07-21 19:38:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:38:46,971 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1061 [2020-07-21 19:38:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:46,979 INFO L225 Difference]: With dead ends: 353 [2020-07-21 19:38:46,979 INFO L226 Difference]: Without dead ends: 344 [2020-07-21 19:38:46,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2129 GetRequests, 2085 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:38:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-07-21 19:38:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 277. [2020-07-21 19:38:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-07-21 19:38:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 878 transitions. [2020-07-21 19:38:47,019 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 878 transitions. Word has length 1061 [2020-07-21 19:38:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:47,019 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 878 transitions. [2020-07-21 19:38:47,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:38:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 878 transitions. [2020-07-21 19:38:47,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1706 [2020-07-21 19:38:47,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:47,043 INFO L422 BasicCegarLoop]: trace histogram [131, 131, 122, 122, 92, 88, 65, 65, 65, 65, 65, 65, 65, 61, 61, 61, 61, 61, 61, 61, 43, 30, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:47,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:47,244 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:47,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1747049415, now seen corresponding path program 22 times [2020-07-21 19:38:47,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:47,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367850172] [2020-07-21 19:38:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:48,799 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:48,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:48,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 3793 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:38:48,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 87238 backedges. 996 proven. 4252 refuted. 0 times theorem prover too weak. 81990 trivial. 0 not checked. [2020-07-21 19:38:50,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:08,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:15,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:17,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:18,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:19,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:19,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:19,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:20,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:20,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 87238 backedges. 996 proven. 4284 refuted. 0 times theorem prover too weak. 81958 trivial. 0 not checked. [2020-07-21 19:39:22,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367850172] [2020-07-21 19:39:22,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:22,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:39:22,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126238039] [2020-07-21 19:39:22,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:39:22,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:22,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:39:22,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:39:22,805 INFO L87 Difference]: Start difference. First operand 277 states and 878 transitions. Second operand 21 states. [2020-07-21 19:39:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:24,062 INFO L93 Difference]: Finished difference Result 420 states and 1705 transitions. [2020-07-21 19:39:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:39:24,067 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1705 [2020-07-21 19:39:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:24,077 INFO L225 Difference]: With dead ends: 420 [2020-07-21 19:39:24,077 INFO L226 Difference]: Without dead ends: 403 [2020-07-21 19:39:24,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3417 GetRequests, 3373 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:39:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-07-21 19:39:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 266. [2020-07-21 19:39:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-07-21 19:39:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 821 transitions. [2020-07-21 19:39:24,136 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 821 transitions. Word has length 1705 [2020-07-21 19:39:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:24,137 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 821 transitions. [2020-07-21 19:39:24,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:39:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 821 transitions. [2020-07-21 19:39:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1212 [2020-07-21 19:39:24,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:24,158 INFO L422 BasicCegarLoop]: trace histogram [101, 101, 78, 78, 65, 65, 50, 50, 50, 50, 50, 50, 50, 39, 39, 39, 39, 39, 39, 39, 36, 26, 15, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:24,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:24,373 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1640222336, now seen corresponding path program 23 times [2020-07-21 19:39:24,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:24,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041579514] [2020-07-21 19:39:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:25,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:25,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 2694 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:39:25,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 44236 backedges. 831 proven. 2470 refuted. 0 times theorem prover too weak. 40935 trivial. 0 not checked. [2020-07-21 19:39:26,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:41,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:41,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:45,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:48,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:48,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:49,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:49,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:49,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:49,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:49,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:50,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:50,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 44236 backedges. 833 proven. 2492 refuted. 0 times theorem prover too weak. 40911 trivial. 0 not checked. [2020-07-21 19:39:52,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041579514] [2020-07-21 19:39:52,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:52,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:39:52,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347515202] [2020-07-21 19:39:52,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:39:52,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:52,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:39:52,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:39:52,862 INFO L87 Difference]: Start difference. First operand 266 states and 821 transitions. Second operand 19 states. [2020-07-21 19:39:53,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:53,952 INFO L93 Difference]: Finished difference Result 454 states and 1985 transitions. [2020-07-21 19:39:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:39:53,955 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1211 [2020-07-21 19:39:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:53,966 INFO L225 Difference]: With dead ends: 454 [2020-07-21 19:39:53,966 INFO L226 Difference]: Without dead ends: 436 [2020-07-21 19:39:53,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2428 GetRequests, 2389 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:39:53,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-07-21 19:39:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 279. [2020-07-21 19:39:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-07-21 19:39:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 891 transitions. [2020-07-21 19:39:54,038 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 891 transitions. Word has length 1211 [2020-07-21 19:39:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:54,038 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 891 transitions. [2020-07-21 19:39:54,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:39:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 891 transitions. [2020-07-21 19:39:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1785 [2020-07-21 19:39:54,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:54,064 INFO L422 BasicCegarLoop]: trace histogram [137, 137, 126, 126, 102, 97, 68, 68, 68, 68, 68, 68, 68, 63, 63, 63, 63, 63, 63, 63, 40, 34, 34, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:54,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:54,265 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1893383234, now seen corresponding path program 24 times [2020-07-21 19:39:54,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:54,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495545523] [2020-07-21 19:39:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:55,820 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:55,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 3966 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:39:55,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 95495 backedges. 1384 proven. 4860 refuted. 0 times theorem prover too weak. 89251 trivial. 0 not checked. [2020-07-21 19:39:57,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:00,795 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:40:03,252 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 19:40:03,366 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 19:40:03,488 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:40:03,618 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:40:03,736 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:40:03,848 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 19:40:03,953 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 19:40:04,060 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 19:40:22,993 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:40:23,101 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:40:23,210 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:40:23,316 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 19:40:23,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:31,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:31,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:32,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:32,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:34,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:34,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:35,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:35,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:35,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:36,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:36,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:36,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:36,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:37,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 95495 backedges. 1388 proven. 4896 refuted. 0 times theorem prover too weak. 89211 trivial. 0 not checked. [2020-07-21 19:40:40,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495545523] [2020-07-21 19:40:40,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:40,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 19:40:40,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068860001] [2020-07-21 19:40:40,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:40:40,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:40,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:40:40,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:40:40,561 INFO L87 Difference]: Start difference. First operand 279 states and 891 transitions. Second operand 23 states. [2020-07-21 19:40:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:41,854 INFO L93 Difference]: Finished difference Result 369 states and 1360 transitions. [2020-07-21 19:40:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:40:41,860 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1784 [2020-07-21 19:40:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:41,867 INFO L225 Difference]: With dead ends: 369 [2020-07-21 19:40:41,868 INFO L226 Difference]: Without dead ends: 360 [2020-07-21 19:40:41,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3576 GetRequests, 3527 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:40:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-07-21 19:40:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 280. [2020-07-21 19:40:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-21 19:40:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 884 transitions. [2020-07-21 19:40:41,908 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 884 transitions. Word has length 1784 [2020-07-21 19:40:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:41,909 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 884 transitions. [2020-07-21 19:40:41,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:40:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 884 transitions. [2020-07-21 19:40:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1269 [2020-07-21 19:40:41,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:41,923 INFO L422 BasicCegarLoop]: trace histogram [94, 94, 93, 93, 72, 67, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 27, 25, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:42,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:42,124 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1283036868, now seen corresponding path program 25 times [2020-07-21 19:40:42,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:42,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054088616] [2020-07-21 19:40:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:43,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:43,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:43,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 2820 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:40:43,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 47827 backedges. 1084 proven. 3331 refuted. 0 times theorem prover too weak. 43412 trivial. 0 not checked. [2020-07-21 19:40:44,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:48,172 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:40:48,286 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:40:49,952 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 19:40:50,067 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 19:40:50,186 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:40:50,301 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:40:50,411 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:40:50,515 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 19:41:03,191 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:41:03,294 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:41:04,115 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:41:04,220 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:41:04,331 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:41:04,446 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:41:04,555 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 19:41:05,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:05,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:10,518 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 19:41:10,942 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:41:11,047 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:41:11,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:15,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:15,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:16,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:16,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:17,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:17,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:17,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:17,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:18,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:18,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:18,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:18,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:18,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:19,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 47827 backedges. 1090 proven. 3369 refuted. 0 times theorem prover too weak. 43368 trivial. 0 not checked. [2020-07-21 19:41:22,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054088616] [2020-07-21 19:41:22,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:22,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 19:41:22,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957570172] [2020-07-21 19:41:22,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:41:22,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:22,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:41:22,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:41:22,065 INFO L87 Difference]: Start difference. First operand 280 states and 884 transitions. Second operand 23 states. [2020-07-21 19:41:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:23,831 INFO L93 Difference]: Finished difference Result 378 states and 1311 transitions. [2020-07-21 19:41:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:41:23,837 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1268 [2020-07-21 19:41:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:23,844 INFO L225 Difference]: With dead ends: 378 [2020-07-21 19:41:23,844 INFO L226 Difference]: Without dead ends: 332 [2020-07-21 19:41:23,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2544 GetRequests, 2495 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:41:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-07-21 19:41:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 290. [2020-07-21 19:41:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-07-21 19:41:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 972 transitions. [2020-07-21 19:41:23,884 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 972 transitions. Word has length 1268 [2020-07-21 19:41:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:23,885 INFO L479 AbstractCegarLoop]: Abstraction has 290 states and 972 transitions. [2020-07-21 19:41:23,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:41:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 972 transitions. [2020-07-21 19:41:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1078 [2020-07-21 19:41:23,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:23,900 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 75, 75, 59, 57, 42, 42, 42, 42, 42, 42, 42, 37, 37, 37, 37, 37, 37, 37, 25, 22, 18, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:24,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:24,113 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:24,114 INFO L82 PathProgramCache]: Analyzing trace with hash 140907570, now seen corresponding path program 26 times [2020-07-21 19:41:24,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:24,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307247992] [2020-07-21 19:41:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:25,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:25,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:25,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 2396 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:41:25,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 34459 backedges. 937 proven. 2322 refuted. 0 times theorem prover too weak. 31200 trivial. 0 not checked. [2020-07-21 19:41:26,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:29,997 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:41:30,106 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:41:31,113 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:41:31,226 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:41:31,349 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 19:41:31,466 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 19:41:31,581 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 19:41:31,689 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:41:40,394 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:41:40,503 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:41:41,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:46,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:52,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:53,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:55,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:55,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:55,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:56,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34459 backedges. 941 proven. 2348 refuted. 0 times theorem prover too weak. 31170 trivial. 0 not checked. [2020-07-21 19:41:58,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307247992] [2020-07-21 19:41:58,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:58,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:41:58,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511635633] [2020-07-21 19:41:58,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:41:58,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:58,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:41:58,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:41:58,490 INFO L87 Difference]: Start difference. First operand 290 states and 972 transitions. Second operand 21 states. [2020-07-21 19:41:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:59,991 INFO L93 Difference]: Finished difference Result 393 states and 1473 transitions. [2020-07-21 19:41:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:41:59,997 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1077 [2020-07-21 19:41:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:00,006 INFO L225 Difference]: With dead ends: 393 [2020-07-21 19:42:00,006 INFO L226 Difference]: Without dead ends: 370 [2020-07-21 19:42:00,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2161 GetRequests, 2117 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:42:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-07-21 19:42:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 280. [2020-07-21 19:42:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-21 19:42:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 871 transitions. [2020-07-21 19:42:00,046 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 871 transitions. Word has length 1077 [2020-07-21 19:42:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:00,046 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 871 transitions. [2020-07-21 19:42:00,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:42:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 871 transitions. [2020-07-21 19:42:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1395 [2020-07-21 19:42:00,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:00,063 INFO L422 BasicCegarLoop]: trace histogram [103, 103, 102, 102, 81, 76, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 30, 27, 25, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:00,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:00,264 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:00,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1122379925, now seen corresponding path program 27 times [2020-07-21 19:42:00,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:00,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836736368] [2020-07-21 19:42:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:01,957 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:01,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:01,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 3099 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:42:01,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 57906 backedges. 874 proven. 2844 refuted. 0 times theorem prover too weak. 54188 trivial. 0 not checked. [2020-07-21 19:42:02,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:07,279 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 19:42:07,391 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 19:42:07,508 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 19:42:07,612 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 19:42:09,794 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 19:42:09,918 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 19:42:10,037 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 19:42:10,151 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 19:42:10,261 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 19:42:23,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:33,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:36,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:36,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:36,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:36,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:38,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 57906 backedges. 874 proven. 2867 refuted. 0 times theorem prover too weak. 54165 trivial. 0 not checked. [2020-07-21 19:42:40,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836736368] [2020-07-21 19:42:40,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:40,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:42:40,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316770013] [2020-07-21 19:42:40,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:42:40,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:40,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:42:40,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:42:40,716 INFO L87 Difference]: Start difference. First operand 280 states and 871 transitions. Second operand 19 states. [2020-07-21 19:42:42,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:42,432 INFO L93 Difference]: Finished difference Result 461 states and 1932 transitions. [2020-07-21 19:42:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:42:42,441 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1394 [2020-07-21 19:42:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:42,453 INFO L225 Difference]: With dead ends: 461 [2020-07-21 19:42:42,453 INFO L226 Difference]: Without dead ends: 443 [2020-07-21 19:42:42,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2794 GetRequests, 2755 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:42:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-07-21 19:42:42,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 271. [2020-07-21 19:42:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-07-21 19:42:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 816 transitions. [2020-07-21 19:42:42,530 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 816 transitions. Word has length 1394 [2020-07-21 19:42:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:42,532 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 816 transitions. [2020-07-21 19:42:42,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:42:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 816 transitions. [2020-07-21 19:42:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2181 [2020-07-21 19:42:42,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:42,602 INFO L422 BasicCegarLoop]: trace histogram [162, 162, 157, 157, 134, 125, 81, 81, 81, 81, 81, 81, 81, 78, 78, 78, 78, 78, 78, 78, 56, 44, 32, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:42,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:42,816 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1789831230, now seen corresponding path program 28 times [2020-07-21 19:42:42,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:42,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900525985] [2020-07-21 19:42:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:44,668 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:44,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 4842 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:42:44,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 142781 backedges. 1734 proven. 6938 refuted. 0 times theorem prover too weak. 134109 trivial. 0 not checked. [2020-07-21 19:42:47,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:49,189 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 19:42:49,297 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 19:42:49,665 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 19:42:49,779 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 19:42:49,904 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 19:42:50,031 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 19:42:50,477 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 19:42:50,611 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 19:42:50,755 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:42:50,902 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:42:51,058 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:42:51,213 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:42:51,378 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:42:51,543 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:42:54,004 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 19:42:54,174 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 19:42:54,360 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 19:42:54,550 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 19:42:59,469 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 19:42:59,667 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 19:42:59,876 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:43:00,086 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:43:00,290 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:43:00,479 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 19:43:00,660 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 19:43:00,822 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:43:00,979 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:43:01,121 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 19:43:01,259 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:43:01,386 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 19:43:01,506 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:43:01,617 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 19:43:29,076 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 19:43:29,182 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 19:43:29,559 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 19:43:29,672 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 19:43:29,794 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:43:29,914 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:43:30,044 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:43:30,160 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:43:30,283 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:43:30,415 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 19:43:32,113 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 19:43:32,239 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 19:43:32,379 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 19:43:32,521 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 19:43:32,655 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 19:43:32,786 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:43:32,906 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 19:43:33,023 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 19:43:33,133 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 19:43:33,239 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46